Apparatus for jointietgr



"UNITED STATES PATENT OFFICE.

BLANCHARD, OF WEST' CAMBRIDGE," i MSSAGHUSET'IS.

\ speiciationf Lettersratent No. 73392,. dated May 2s, i850.

To allwwm tmay concern.'

Be it known that I, ALANsoN BLANCHARD, of vWest Cambridge,inz thecountyof MiddlesexandV State otMassachusetts, have invented al `new and`usefulY `o-r y improved `machine to be used.bycarpentersaand for thepurpose of i facilitating the #reduction of boards to a desirable shapeor widthi;` `and I do hereby declare that the same is `fully. describedand represented in` the following specification and accompanyingdrawings, letters, igures, and `references thereof.

Of the said drawings, Figure 1,.,denotes a top View. Fig.2, absideelevation; Fig. 3, a transverse, central, and vertical section, and Fig.4, a longitudinal, central, and vertical section, of my said machine.Fig. 5, is a section of the plane stock, and cutter, taken in the planeof the said cutter.

In the said drawings, A, represents a strong wooden frame composed inpart of two horizontal and parallel rails or timbers, a, a, supported ata suitable distance apart, by means oi four posts b, c, d, e, which areerected perpendicularly upon a base board f. The said rails a, a, arearranged at a suitable distance apart, and sufficient to receive andguide between them, a carpenters hand plane B, which when placed betweenthem, is supported on them by means of two ledges, g, h., affixed to itsopposite sides. The bottom surface of the plane B, is made to extend ashortdistance below the top surface ofthe rails. D, exhibits the cutteriron of the plane stock. Instead of being conned in the stock by meansof a wedge, driven on the front side or face of it, in the usual way, Ifix the same in position by means of a set screw 7L, made to screw andextend through or into the side of the plane stock, and so as to becapable of being screwed hard against the edge of the cutter rim, asseen in Fig. 5. By such means of confinement of the cutter iron, andsuch an arrangement of the same, the iron can be much more readily andperfectly adjusted in a correct position, than it can when a wedge isused, as in the common jack plane.

Between the posts of the frame, and underneath the plane B, is what Iterm the adjustable support bed or bar C. It consists of a long beam,supported by means ot two or any other suitable number of upright screwsD, E, each of which is held in position, (as seen in the drawings,) bymeans oi' suitable frame work F i or G, extended I "i from the end ofthe main frame. Each screw has'aawinch or handle H, by which it may beturned in a direction so as to either elevate or depressthe connected oradjacent end of" the support bar C. i

Alscrew nut L,His adapted to each screw, and is placed within a: recessor opening` K, made through the end of the bar C.' i From the twoopposite sides of the screw nut, ears or projections z', lo, (see Fig.6, which de- `notes a central cross section of the nut",

screw, and the support bar C,) are madeto extend respectively into twoslots,or passages, l, m, made` in the opposite edgeofthe support bar,and extending through it to meet the opening K. Such contrivancesconnecting the support bar, and each of the screws, are to enable thesupport bar, to be readily raised or lowered at one or both ends, and byeither one or both of the screws as occasion may require.

Besides the support bar C, there are two lateral sustaining or clampingbars, L, M, each of which is arranged between the two posts, of eitherside of the frame, and so applied to the posts as to be capable of beingfreely raised up, or lowered down, as circumstances may rendernecessary. To one of these bars (viz L,) a clamping contrivance islixed, the same consisting of a screw VN, and a nut O. The screw N, isso applied to the bar, as to admit of being itreelyfrotated on its axis,but not of being moved in a longitudinal, or lengthwise direction. Thenut should be so applied to the screw and the bar, as to be capable ofmoving freely back and forth on the screw in a longitudinal direction,(that is in a direction of the axis of the screw,) while it is preventedfrom rotating on the screw. By such 'an application it will be seen,when the screw is rotated by the hand applied to its handle p, and theclamp nut and the screw rotated, will cause the clamp nut to be eitherforced or moved, in one direction or the other on its screw.

Fig. 7, denotes a longitudinal section of the screw, and clamp nut asapplied to the bar L. Fig. 8, is a vertical section of them. Fig. 9, isan end view of the said nut.

In the operation of this machine, two or more boards may be reduced toany determinate width at once, they being placed between the rails a, a,and suffered to rest on the supporting beam C, and being held in ,place'by means of the clamp screw and nut,` ,and clamping bars.

In order to makethem of an equal width throughout, the workman firstregulates the depth of both ends of the supporting bar C, in such manneras not only to bring its upper surface parallel to the plane of theupper surfaces of the rails' a, a, butat the same time to bring it lto adepth below the same, equal to the width' required for the boards, addedto that of the projection of the bottom of the plane below its ledges orits sides. So when boards are lto be reduced to a greater width at oneend than they are at theother, the bar C, is brought into an inclinedposition, and to the depth required to give to the boards their properwidths. When so fixed in position f the workman applies the plane to theupper edges of the boards, and planes them down, or operates it thereon,until he is prevented from further reduction of them, by means ofcontact of the ledges of the plane, with the n top surfaces of therails, a, a, the said top surfaces serving to so regulate t-he final cutof the plane iron, as to gage the boards to thev required widths.

UThe object of this machine, is to enable carpenters to reduce withgreat facility, and little care, blind stuff, stair treads, or variousother boards, to equal or, unequal *widths What I claim as my invention,is-

The combination of the frame A, with its

